1240331421 has 32 divisors (see below), whose sum is σ = 2018304000. Its totient is φ = 662235840.

The previous prime is 1240331401. The next prime is 1240331429. The reversal of 1240331421 is 1241330421.

It is not a de Polignac number, because 1240331421 - 2¹⁰ = 1240330397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240331429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13971 + ... + 51728.

It is an arithmetic number, because the mean of its divisors is an integer number (63072000).

Almost surely, 2^1240331421 is an apocalyptic number.

It is an amenable number.

1240331421 is a deficient number, since it is larger than the sum of its proper divisors (777972579).

1240331421 is a wasteful number, since it uses less digits than its factorization.

1240331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65769.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1240331421 is about 35218.3392708969. The cubic root of 1240331421 is about 1074.4327769431.

Adding to 1240331421 its reverse (1241330421), we get a palindrome (2481661842).

The spelling of 1240331421 in words is "one billion, two hundred forty million, three hundred thirty-one thousand, four hundred twenty-one".